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<br />Regional look and the perspective of history
<br /> 1950 Census % of Esl. Pop Esl. Pop.
<br />Geogrophical Pop of Esr Pop Conne-cled Served by Served by
<br />Pop. Sewage Primary.
<br />Area Sewered Connecled DIscharged, Intermediate Secondary
<br /> Commumties to Sewers Treated Plonfs Plants
<br />I. New England 7.5 6.4 69.3 2.4 1.1
<br />2. Middle ArlontlC 24.9 23.9 71.4 78 8.6
<br />3. South Arlantic 10.1 9.5 72.4 ~5 ~3
<br />4. East Norfh Centro! 22.6 22.3 887 5.8 13.9
<br />5. East South Centrol 4.5 4.1 55.7 1.4 Q9
<br />6. Wesf North Centrol 8.5 7.5 63.1 1.7 31
<br />7. Wesl Southeenlral 8.7 8.1 835 0.5 63
<br />8. Mounlain 3.1 3.5 77.8 i.l 1.7
<br />9. Pacific 12.1 12.9 90.7 72 4.4
<br />Totol 102.0 98.3 777(Avg) 314 433
<br />
<br />r - Moine. N.H., VI., Mass., R,I., COIlil. 6- Minn., lowo, Mo., N.D., S.D., Neb, Ken.
<br />2-NY, N.J., Po. 7- Ark., Lo, Oklo, Tex.
<br />T'DeI.~Mif~Districtof'COJuml:iia.-Vlf;W. Vf1,"N.C~S.c.-8:-MonT.;""ldah"O,"Wyo, Colo., N.M., Ariz.,
<br />4-0hio, Ind., 111., Mich., Wis. Utah, Nev.
<br />5-Ky., Tenn., Ala, Miss. 9- Wash.,Ore., Calif
<br />
<br />7 Where the twain meet-sometimes
<br /> Tofal Numbe!" of Pop. Served
<br /> U.S. Sewered 8y
<br />Year Pop. - Millions Communifies Sewers- (Millions)
<br />-
<br />1860 31.4 10 1.0
<br />1870 386 100 4.5
<br />1880 50.2 400 95
<br />1890 62.9 450 16.1
<br />1900 760 950 24.5
<br />1910 92.0 1.600 34.5
<br />!920 105.7 3,000 47.5
<br />1930 122.8 5,100 61.5
<br />1935 132.0 6,800 69.5
<br />1940 132.7 8,516 70.5
<br />1945 139.6 8,917 747
<br />194B 1446 - 76.7
<br />1949 1492 - 78.9
<br />1957 171.2 11.131 98.4
<br />
<br />8 Sewers are catching up
<br />
<br />The connected population can ex..
<br />ceed the census population in Tal:le 7,
<br />since the biter is based on the 1950
<br />census in most instances. Onl~' <l]ong
<br />the Pacinc Const do the connected fig~
<br />ll,Tes exceed 100% of census pOpll1a~
<br />tlOn.
<br />Although the East-South-Central
<br />,lfC<I I1:lS only 55.7% SCWCH:cl popula-
<br />tion sen'cd hy treatment of ;1Il~' type.
<br />the cOlllpaT:1hle figure in 19-f) was o11h-
<br />')1.3%. indicating suhstJntial progress.
<br />J n the Ohio River bClsin (not shown)
<br />;3% of the sewered popubtion i~
<br />ser\'t~d by treatment. 111is. too, repre-
<br />sents slIbstcmtial progre-"s in \'icw of
<br />what existed in this basin 10 YC<HS :lgO.
<br />Stud" of the regional differences in-
<br />dicates'there Olav be some corrchttioll
<br />between degree 'of treatmcnt and in-
<br />t(;nsity of industrinlization. There also
<br />
<br />is possihle correlation between degree
<br />of tre<ltment and population densitv.
<br />However, ;1 det;liled ,1Ilalvsis of these
<br />factors has not vet been made.
<br />Tahle R bears out the conclusion
<br />that new urban population is bein~
<br />connected to sewers as it develops and
<br />that inroads arc heing m,lde in cutting
<br />clown the existing unconnected popu-
<br />lation. In 1945, about 5,.5% of the
<br />total U. S. population W<lS connected to
<br />sc:wcrs. while in 1957, the figure was
<br />57.5%.
<br />lher 2.200 communities h,l\'e in-
<br />st;llled sewers since 1945. .1Il increclse
<br />of 25%. Corresponding incre,lse in
<br />popuhltion is 32%. Since the cenSlls
<br />population during these yeClrs rose olll~'
<br />25%, further credence is gi,'cn the con-
<br />clusion thClt the unconnected urban
<br />population is being reduced.
<br />
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